package org.jparrow.framework.util;

public final class CastUtil {

	/**
	 * תΪString��
	 */
	public static String castString(Object obj){
		return CastUtil.castString(obj, "");
	}

	/**
	 * תΪString��(�ṩĬ��ֵ)
	 */
	private static String castString(Object obj, String defaultValue) {
		return obj != null ? String.valueOf(obj) : defaultValue;
	}
	
	/**
	 * תΪDouble����
	 */
	public static double castDouble(Object obj){
		return CastUtil.castDouble(obj, 0);
	}

	/**
	 * תΪdouble�ͣ��ṩĬ��ֵ��
	 */
	private static double castDouble(Object obj, double defaultValue) {
		
		double doubleValue = defaultValue;
		
		if(obj!=null){
			String strValue = castString(obj);
			
			if(StringUtil.isNotEmpty(strValue)){
				try{
					doubleValue = Double.parseDouble(strValue);
				}catch(NumberFormatException e){
					doubleValue = defaultValue;
				}
			}
			
		}
		
		return doubleValue;
	}
	
	/**
	 * תΪlong��
	 */
	public static long castLong(Object obj){
		return CastUtil.castLong(obj, 0);
	}

	/**
	 * תΪlong�ͣ��ṩĬ��ֵ��
	 */
	private static long castLong(Object obj, int defaultValue) {
		long longValue = defaultValue;
		
		if(obj != null){
			String strValue = castString(obj);
			
			if(StringUtil.isNotEmpty(strValue)){
				try{
					longValue = Long.parseLong(strValue);
				}catch(NumberFormatException efe){
					longValue = defaultValue;
				}
			}
		}
		
		return longValue;
	}
	
	/**
	 * תΪint��
	 */
	public static int castInt(Object obj){
		return CastUtil.castInt(obj , 0);
	}

	/**
	 * תΪint��
	 */
	private static int castInt(Object obj, int defaultValue) {
		int intValue = defaultValue;
		
		if(obj != null){
			String strValue = castString(obj);
			if(StringUtil.isNotEmpty(strValue)){
				try{
					intValue = Integer.parseInt(strValue);
				}catch(NumberFormatException e){
					intValue = defaultValue;
				}
			}
		}
		
		return intValue;
	}
	
	/**
	 * תΪboolean��
	 */
	public static boolean castBoolean(Object obj){
		return CastUtil.castBoolean(obj , false);
	}
	
	/**
	 * תΪ������(�ṩĬ��ֵ)
	 */
	public static boolean castBoolean(Object obj , boolean defaultValue){
		boolean booleanValue = defaultValue;
		if(obj != null){
			booleanValue = Boolean.parseBoolean(castString(obj));
		}
		return booleanValue;
	}
	
}
